The king considering war teaches sober calculation of the cost of discipleship.

Luke 14:31–32

³¹Or what king, going to make war against another king, sitteth not down first, and consulteth whether he be able with ten thousand to meet him that cometh against him with twenty thousand?

³²Or else, while the other is yet a great way off, he sendeth an ambassage, and desireth conditions of peace.